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Utility of Pre-Hematopoietic Cell Transplantation Sinus CT Screening in Children and Adolescents

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Utility of Pre-Hematopoietic Cell Transplantation Sinus CT Screening in Children and Adolescents Published April 9, 2020 as 10.3174/ajnr.A6509 ORIGINAL RESEARCH PEDIATRICS Utility of Pre-Hematopoietic Cell Transplantation Sinus CT Screening in Children and Adolescents J.H. Harreld, R.A. Kaufman, G. Kang, G. Maron, W. Mitchell, J.W. Thompson, and A. Srinivasan ABSTRACT BACKGROUND AND PURPOSE: The clinical benefit of pre-hematopoietic cell transplantation sinus CT screening remains uncertain, while the risks of CT radiation and anesthesia are increasingly evident. We sought to re-assess the impact of screening sinus CT on pretransplantation patient management and prediction of posttransplantation invasive fungal rhinosinusitis. MATERIALS AND METHODS: Pretransplantation noncontrast screening sinus CTs for 100 consecutive patients (mean age, 11.9 6 5.5 years) were graded for mucosal thickening (Lund-Mackay score) and for signs of noninvasive or invasive fungal rhinosinusitis (sinus calcification, hyperattenuation, bone destruction, extrasinus inflammation, and nasal mucosal ulceration). Posttransplantation sinus CTs performed for sinus-related symptoms were similarly graded. Associations of Lund-Mackay scores, clinical assessments, changes in pretransplantation clinical management (additional antibiotic or fungal therapy, sinonasal surgery, delayed transplanta- tion), and subsequent development of sinus-related symptoms or invasive fungal rhinosinusitis were tested (exact Wilcoxon rank sums, Fisher exact test, significance P , .05). RESULTS: Mean pretransplantation screening Lund-Mackay scores (n ¼ 100) were greater in patients with clinical symptoms (8.07 6 6.00 versus 2.48 6 3.51, P , .001) but were not associated with pretransplantation management changes and did not predict post- transplantation sinus symptoms (n ¼ 21, P ¼ .47) or invasive fungal rhinosinusitis symptoms (n ¼ 2, P ¼ .59). CONCLUSIONS: Pre-hematopoietic cell transplantation sinus CT does not meaningfully contribute to pretransplantation patient management or prediction of posttransplantation sinus disease, including invasive fungal rhinosinusitis, in children. The risks associ- ated with CT radiation and possible anesthesia are not warranted in this setting. ABBREVIATIONS: ENT ¼ ear, nose, and throat; GVHD ¼ graft versus host disease; HCT ¼ hematopoietic cell transplantation; IFRS ¼ invasive fungal rhinosinusitis ue to prolonged immunosuppression, children under- (ENT) examination, infectious disease risk assessment, fungal Dgoing hematopoietic cell transplantation (HCT) are at serologies, and noncontrast sinus CT. increased risk of opportunistic infections, including potentially However, the clinical utility of screening sinus CT remains lethal invasive fungal rhinosinusitis (IFRS).1-5 Children at St. unclear, and the practice is not universal. According to the Jude Children’s Research Hospital, therefore, undergo rigorous American Academy of Pediatrics and the American College of pretransplantation evaluation, including ear, nose, and throat Radiology, uncomplicated sinusitis should be a clinical diagno- sis,6,7 and several large studies (n $ 100) have failed to identify pre-HCT imaging features predictive of post-HCT sinusitis.8-10 Received June 3, 2019; accepted after revision March 3, 2020. From the Departments of Diagnostic Imaging (J.H.H., R.A.K.), Biostatistics Fewer studies have evaluated the contribution of pretransplanta- (G.K.), Infectious Diseases (G.M.), Bone Marrow Transplantation and Cellular tion CT to patient management or prediction of posttransplanta- Therapy (W.M., A.S.), and Surgery (J.W.T.), St. Jude Children’s Research Hospital, Memphis, Tennessee; and Department of Otolaryngology (J.W.T.), University of tion IFRS. A small study in adults found that screening sinus CT Tennessee Health Sciences Center, Memphis, Tennessee. did not contribute to a pretransplantation diagnosis or manage- This work was supported, in part, by grant No. CA21765 from the National Cancer ment or predict posttransplantation sinusitis or IFRS, but it was Institute and by the American Lebanese and Syrian Associated Charities. 11 Please address correspondence to Julie H. Harreld, MD, Department of Diagnostic limited by a small sample size. A study of 187 children reported Imaging, St. Jude Children’s Research Hospital, 262 Danny Thomas Place, MS 220, an association between pre-HCT sinus CT findings and manage- Memphis, TN 38105; e-mail: [email protected] ment changes, but while 119 (64%) had abnormal sinus CT find- Indicates open access to non-subscribers at www.ajnr.org ings, only 29 had symptoms and were treated, suggesting http://dx.doi.org/10.3174/ajnr.A6509 symptoms, not imaging, drove treatment.12 AJNR Am J Neuroradiol :2020 www.ajnr.org 1 Copyright 2020 by American Society of Neuroradiology. While the benefits of pre-HCT sinus CT remain unclear, the Images were reviewed in consensus by a board-certified pe- risks associated with sinus CT are well-established and include diatric radiologist with 40 years’ experience (R.A.K.) and a a low-but-real risk of radiation-induced cancers13,14 and early board-certified neuroradiologist with 10 years’ experience cataract formation.15 Evidence is also emerging that anesthesia, (J.H.H.) for the presence or absence of bone destruction, required by some children to complete CT, may negatively extrasinus inflammation, and nasal mucosal ulceration, associ- impact cognitive development.16,17 On the other hand, advan- ated with IFRS.4,19-22 Because noninvasive fungal disease ces in fungal prophylaxis have significantly reduced the inci- could theoretically predispose to IFRS with pre-HCT condi- dence of invasive fungal infections in immunocompromised tioning/immunodepletion, the presence of calcifications and children.18 sinus hyperdensity was also noted.23 Given these potential shifts in the risk-benefit ratio, we sought Each anterior and posterior ethmoid, maxillary, frontal, and to re-evaluate the clinical utility of pre-HCT screening sinus CT sphenoid sinus was graded as clear ¼ 0, partially opacified ¼ 1, for IFRS risk assessment and its role in pre-HCT management of or completely opacified ¼ 2; each ostiomeatal unit was graded pediatric patients. as clear ¼ 0 or occluded ¼ 2; and the numbers were added per Lund and Mackay.24 To account for age-related differences in MATERIALS AND METHODS sinus development, we calculated an adjusted Lund-Mackay 25 With institutional review board approval and waiver of consent, score as imaging, clinical, ENT risk assessment, and laboratory data were Adjusted Lund Score ¼ prospectively recorded for 100 sequential participants who had pre-HCT screening sinus CT at our institution between June  24 : Raw score : 2015 and April 2017. A sample size of 100 was chosen to detect at Maximum Lund for No Pneumatized Sinuses least 1 case of IFRS, which has an incidence of approximately 2% in patients with hematologic disorders.2 The patients’ medical records were reviewed for microbiologic diagnosis of IFRS for at Statistical Analysis least 100 days posttransplantation. With additional institutional Sinus CT scores, laboratory values, symptoms, changes in man- review board approval and waiver of consent, medical records agement, and ENT risk were compared using the Fisher exact test 2 were retrospectively reviewed for subsequent clinical, imaging, or the Pearson x test for categoric variables and a 2-sample t test and laboratory data until the patient’s death or November 2017. or (exact) Wilcoxon rank sum test for continuous variables, based on the normality assumption. The Lund-Mackay scores between Clinic and Laboratory pre- and posttransplantation were compared using a 1-sample t Recorded data included primary diagnosis; transplant donor test or Wilcoxon signed rank test, depending the normality type; absolute neutrophil count at imaging; pretransplantation assumption. All P values are 2-sided and were considered statisti- imaging indication; development of posttransplantation graft ver- cally significant if ,.05. Statistical analyses were performed with sus host disease (GVHD) grades II–IV (moderate-to-life-threat- R-3.6.1 (R statistical and computing software; http://www.r- ening); pretransplantation galactomannan (Aspergillus antigen); project.org/). sinonasal symptoms (rhinorrhea, congestion, nasal/facial pain, swelling, visible nasal lesion), or fever at pretransplantation evalu- ation; and changes to pretransplantation management (changes RESULTS in fungal prophylaxis regimen, addition of antibiotics, sinonasal One hundred participants (60 males, 40 females; 8 months to 6 6 operation, or delay of HCT) attributable to screening sinus CT. 24 years of age; mean, 11.9 5.5 years; males, 11.6 5.7 years; 6 ENT pretransplantation risk assessment included visualiza- females, 12.5 5.2 years) had screening sinus CT an average of 6 tion of the nasal septum, palate, and back of throat under magni- 24.6 9.6 days before transplantation for IFRS risk assessment. fication and complete allergy and sinusitis histories. These Patient characteristics, imaging, and clinical findings are sum- findings were summarized as “at-risk” or “not at-risk” for IFRS. marized in Table 1. ¼ For patients requiring post-HCT sinus imaging for symptoms, Follow-up for survivors (n 82) ranged from 189 to 889 days we recorded symptoms, galactomannan serologies, endoscopy post-HCT. During the follow-up period, 9 patients died of findings, fungal organism (if applicable), and consecutive days of relapsed disease from 28 to 519 days post-HCT. Nine died of neutropenia (absolute neutrophil count , 500/mm3) immedi- complications
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